diff options
| author | Dmitry Safonov <dsafonov@virtuozzo.com> | 2016-09-05 16:33:05 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2016-09-14 22:28:09 +0300 |
| commit | 2eefd8789698e89c4a5d610921dc3c1b66e3bd0d (patch) | |
| tree | f9f1fe811f7f2c5395b4c5ba2bb9d6b54ea026cd /arch/x86/include | |
| parent | 576ebfefd37bd41e965787f60684c8e4b7f79457 (diff) | |
| download | linux-2eefd8789698e89c4a5d610921dc3c1b66e3bd0d.tar.xz | |
x86/arch_prctl/vdso: Add ARCH_MAP_VDSO_*
Add API to change vdso blob type with arch_prctl.
As this is usefull only by needs of CRIU, expose
this interface under CONFIG_CHECKPOINT_RESTORE.
Signed-off-by: Dmitry Safonov <dsafonov@virtuozzo.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: 0x7f454c46@gmail.com
Cc: oleg@redhat.com
Cc: linux-mm@kvack.org
Cc: gorcunov@openvz.org
Cc: xemul@virtuozzo.com
Link: http://lkml.kernel.org/r/20160905133308.28234-4-dsafonov@virtuozzo.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/vdso.h | 2 | ||||
| -rw-r--r-- | arch/x86/include/uapi/asm/prctl.h | 6 |
2 files changed, 8 insertions, 0 deletions
diff --git a/arch/x86/include/asm/vdso.h b/arch/x86/include/asm/vdso.h index 43dc55be524e..2444189cbe28 100644 --- a/arch/x86/include/asm/vdso.h +++ b/arch/x86/include/asm/vdso.h @@ -41,6 +41,8 @@ extern const struct vdso_image vdso_image_32; extern void __init init_vdso_image(const struct vdso_image *image); +extern int map_vdso_once(const struct vdso_image *image, unsigned long addr); + #endif /* __ASSEMBLER__ */ #endif /* _ASM_X86_VDSO_H */ diff --git a/arch/x86/include/uapi/asm/prctl.h b/arch/x86/include/uapi/asm/prctl.h index 3ac5032fae09..ae135de547f5 100644 --- a/arch/x86/include/uapi/asm/prctl.h +++ b/arch/x86/include/uapi/asm/prctl.h @@ -6,4 +6,10 @@ #define ARCH_GET_FS 0x1003 #define ARCH_GET_GS 0x1004 +#ifdef CONFIG_CHECKPOINT_RESTORE +# define ARCH_MAP_VDSO_X32 0x2001 +# define ARCH_MAP_VDSO_32 0x2002 +# define ARCH_MAP_VDSO_64 0x2003 +#endif + #endif /* _ASM_X86_PRCTL_H */ |